Ogwen25 - Yr Helgi Du

Ogwen | Yr Helgi Du 2025 is a mountain trail running event held in the stunning Ogwen Valley within Eryri (Snowdonia), North Wales, starting from Plas y Brenin, Capel Curig. The race offers three distances—10K, 25K, and 40K—covering some of the highest mountains in England and Wales, including the Carneddau and Glyderau ranges. The course features epic, technical terrain with challenging ascents and spectacular skyline views.

Designed to test experienced runners while supporting those advancing in mountain running, the event includes marked trails, on-course support, lively event village amenities, professional timing, and unique finisher mementos. It is a bilingual event celebrating Welsh landscapes and culture. Visit the organization's website for the most recent information.